diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index a4eee324eb1ece730780079d0d968b316330a1e6..84e6a7e673b7a5cebf2a4cd3b79e43749e20a331 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -1000,6 +1000,8 @@ static int hpet_acpi_add(struct acpi_device *device)
 		return -ENODEV;
 
 	if (!data.hd_address || !data.hd_nirqs) {
+		if (data.hd_address)
+			iounmap(data.hd_address);
 		printk("%s: no address or irqs in _CRS\n", __func__);
 		return -ENODEV;
 	}